Automatic safety-stop for air-brakes.



No. 736,2 2. H PATENTED AUG. 11', 1903.

W. H. HUGHES & J. ROCHE.

AUTOMATIC SAFETY STOP FOR, AIR BRAKES. APPLIUATI'ON FILED J LY 17, 1902.

N0 MODEL.

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Patented August 11, 1903.

WILLIAM H. HUGHES AND JOHN ROCHE, OF SAPULPA, INDIAN TERRITORY, ASSIGNORS OF ONE-HALF TO WILLIAM HENRY, OF MONETTE, MISSOURI, AND'GEORGEA. HANCOCK, OFSPRINGFIELD, MISSOURI.

AUTOMATIC SAFETY-STOP FOR AIR-BRAKES.

SPECIFICATION forming part of Letters Patent No. 7 36,262, dated August 11, 1903.

Application filed Jul 17, 1902.

To all whom trim/y concern:

Be it known that 'we, WILLIAM H. HUGHES and JOHN ROCHE, of the city of Sapulpa, Creek Nation, Indian Territory, have invented certain new and useful Improvements in Automatic Safety- Stops for Air Brakes, of which the following is a full, clear, and eX- act description, reference being had to the accompanying drawings, forming apart hereof.

Our invention relates to automatic safetystops for air-brakes; and it consists of the novel features herein shown, described, and claimed.

Figure 1 is a sectional side elevation of a :5 portion of a car having our invention applied thereto. Fig. 2 is a detail View, in perspective, showing the pipe which-connects with the train-pipe and also exhibiting the devices for automatically releasing the air-com 2o tained within the train-pipe.

The object of our invention is to provide an improved automatic safety-stop for airbrakes, whereby the air in the train-pipe will be automatically released whenever one or z 5 more wheels of the train are accidentally derailed. Usuallyit has been necessary for the conductors valve to be operatedby hand in 'case of an accidental derailment of the train or any portion thereof.

We have not deemed it necessary to illustrate the customary air'brake apparatus, except the train-pipe thereof.

1 indicates the usual train-pipe, which extends from end to end of each car composing the train, and leading from said pipe 1 adjacent each of the truck-wheels is a branch pipe 2, provided'with a common cock or valve 3, which is normally closed.. This valve is provided with a crank 4:, from which extends 4o downwardly a connecting-rod 5, and from the lower end of said rod is preferably connected a cross-piece 6. This cross-piece is normally supported about one inch above the rail 7,

and the rod 5 is guided and retained in a ver- 5 tical position by means of a suitable guide and brace 8, the upper end of which is con nected to the bottom of the car, so that the said rod will be both guided and braced and yet permitted to move freely in a verticaldi- 5o rection within the guide 8.

Although we have shown but a single crosspiece 6 and its connections, and these adja- Serial No. 115,894. (No model.)

cent one of the car-Wheels, yet it is obvious that the apparatus shown may beduplicated and applied to each wheel of the train without departing from the scope and spirit of our invention, or in some cases we may move the rod 5 and its connections to a point centrally located between two wheels on the same side of the truck.

The operationis as follows: Should a derailment accidentally occur while the car is in motion and the Wheel 9 or the wheel 10 leave the rail 7, (or should any of the wheels of the train equipped with our device leave the rail,) said wheel will immediately drop a sufficient distance to bring the cross-piece 6 into contact with the rail, and as the downwardmovement continues the rod 5 will be shoved upwardly and thereby move the crank 4 and open the cock 3 and release the air in the train-pipe 1, and the brakes will thereby be applied in the well-known manner and make an emergency stop. In this mannor a stop can be made much more quickly 75 than by using the ordinary conductors valve, as the brakes will be applied by our device without any loss of time, and much loss of life and destruction of property may thereby be prevented.

We claim- The improved safety-stop for air-brakes, comprising the combination of a train-pipe, a branch pipe, a cock 3 connected to said branch pipe, a crank 4 connected to said cook, a rod 5 extending downwardly from said crank, a cross-piece 6 at the lower end of said rod, extending transversely over and above the rail and beyond each side thereof and adapted to engage with the rail in case of derailment, and a suitable guide and brace-8, the upper end of which is connected to the bottom ofthe car so that the said rodwilllbe both guided and braced, and yet permitted to move freely in a vertical direction within said guide, substantially as specified.

In testimony whereof we affix our signa tures in presence of two witnesses.

WM. H. HUGHES.

hi JOHN ROCHE.

mark

Witnesses:

HARRY CAMPBELL, J OHN T. HARRIS. 

